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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f6050aa9ce895ef32ca79e7be6517ad466d03b40af03d04cd5ca0dfe49bd5b09' 
  AND token = 'LiWD0cmF4NsugOQ0RWQyRW6ycbi1kbY38ecDfLiDKH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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