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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e41a7d9709bd74c447ef58a03081c0f7c255960df141b7e316f3a7f35e5c7dd7' 
  AND token = 'PWDqlVjd+SZokpuIyftAj2VySNEjVQOhs73hM1n3us8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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