Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2988913520b491d754d9e23328c4eb7031a3eef5653b98951c44fcd5d5008b11' 
  AND token = 'iZVr0dX7mzI5ilh9JwAJHJku860wiNgNA8UJ0Iom1Hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}