Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6619c02877782d7fe5e322a21a7c7737692ea0e181f8450949e5499aae724c9' 
  AND token = 'VCtDzU2iKJOLiGm/B3HcjMW81tHTGO/2nT3Qk2TBjPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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