Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '159ba073d9faf3e53422c6a61a0ad27efdf87c9e0b1c53c4ea7ecab1a7be263d' 
  AND token = 'yPK2YvxyOCPhbvEycs9S+7Jl6svyX/03d4ia8l4HkuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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