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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'b260c7c2e02b5d3008477f4b2119cec29aa0b3d7e62b7347e691d193925148e4' 
  AND token = 'NohmRijJZVHnDN74ompRzy1HBA4wrStPQ9/x/iW/4OE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}