Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4845540501291280ebe3d476d9411fca4d2559664d6cbe108858af6ced0f19b3' 
  AND token = 'g0ZyYeSSIPBlRSva75RKjJhYMl49ezlTGOkeiy3SHDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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