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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e63657db01db0b06e6e0b32c309fabda845e55818271a4c8c71c7dc7c0891b37' 
  AND token = 'Wk0zRf91GpHSiUbkUBVwNa8cWf80P6kvtpn1a2C46Fw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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