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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1476f7e88c4684f582c9ae848412df85e8104687053cd9fb0fc74ce1d604e10e' 
  AND token = '9HwSRpHlryEFdZ2O4rqf5J0AicdqPuundmXpaaEu+UY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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