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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3fba07e7d279c6fe919137e0cbd9ba0c70dd0f7a22b966052af3d080d4d11cdd' 
  AND token = 'u5MXViM0opzeOazs6O8hsIp/UVNnnsfAF0QjFMMDASw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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