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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff45344f24a605904c37fc7f704dcf1c1db7ecfd1fc7d858e173fdaaba30b6a8' 
  AND token = '5KGL7W27FFUQ7turAws7e88Ps1j8JLmtHTlEj4z9UP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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