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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1a822225eb4af6336dfca97ae735a1f6209598436756d1798a018ba12928aaa' 
  AND token = 'bctvk57Q25Q4KdXOqGpqNR7K/006vdP+EH9gaqGOAGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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