Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fd5a72161125c723503693c2c6fcaa2052644d617c8c0a5b68aa70d1393dba3' 
  AND token = '6splODRZgPAw4JPiKgONly7xBVw95xLd9unpSCnFlJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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