Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '345622e5ae77b32d68a7deaf37cf8469476527a5b6316150b4da5d7a86353d81' 
  AND token = 'wJgZfGlXEsqcuXgQwr4Ik3Wu1HRhc9FxsXUfprtfkbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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