Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ce172d3bb5593fd1dd0e0ed07e9639e27a53bca94aded1ee3d45b3cf5a6eb89' 
  AND token = 'Ou3aCaZIQ9jZxZNVh/rX3wBmx+H45iRf1UXCoFWQ1Rw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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