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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8617edd948e2ceb2d02828a217d22ea0f394ddfc0a22c16250112305ad3409fb' 
  AND token = 'dBsfEcrQAUvtyWb31gM5a6w/E3KRER1E6kivFIhjXHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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