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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ddee1604060945c61632fd1a0f69728403d4e69bd5f7123dae8243533134fc25' 
  AND token = 'uKxXH9ggOG/bqok9iqNSvRq/G5g8AdQTKFIyoT52Lis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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