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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9379c86ff22c0b90c489bedae7eb36134a1f7a8cb518e509c5e039e5955d8977' 
  AND token = 'QyAveTOa5yZM23ECaETRWn+0dflca6dkQUs5pYJpnf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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