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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66d42dd66312f74a0133a8b36dadc2127eda0ab93f537a993e4f78204d7ca746' 
  AND token = 'Ckjfchb89JwAxYklq/cW3cXsIM9Z8V2oRELyL9F2IYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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