Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d92fe8db958979d1da20170cc0b32f173127bd47f9a913a09f27dbd27b847fc' 
  AND token = 'q2hRvA1PhmgQDQbWHVO2oU4IYC2csSAmypsoKNqd65M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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