Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef0778b1b66cafb1e14eb09c2c4f7dc7308b8df05f28db0e69f4dea8f5c664ba' 
  AND token = 'c8aeqfNEJ48SUn1CUtlir3YwJzWOwmJLNR2pc9n8uzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}