Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8075fc895ccfdd4ebfa3d64c564410decb1642cd45d9abb9664f3035aeb0c004' 
  AND token = 'qNaHPHJPFKo4pidls0zFO4gWJU7mBKYzuNno2qmESds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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