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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a101aa8deafdf101e5a8b04d6002ad44a43aaa00ceec37044da6dc51a6138d9d' 
  AND token = 'ykmfmdeNCfah5r2d+25Ijdq0UqcKk3IBUoiNA9KRnpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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