Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b612cf9db0aa583e40c49db25d2ed882c77c396fb64bfdf895e7f8ef69ac4fed' 
  AND token = 'OIv9TneO80EaGChukymmLXESKP9vGt+Vg6UZ4RbS/Lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}