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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5c7e608848df55ed9a2eae61a64c9b6e55ef42b06cacf1a6009e1692db71241' 
  AND token = 'hbp0iEOvDpxaCFkaat8TL6b9UrPqe7jeqRn3OZq+hiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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