Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c1766b76e451b3935c364c252d3ec511f5861d3bf18b8961ed89945de3556d4' 
  AND token = 'a4OCfk3qqUtp44xEvr9mUCO1lcnBHQ9xK6Ss523VTFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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