Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94f7518e23cf0be892910e9d3c75273e9222971ece3a28634714834eac95034f' 
  AND token = 'cVj+19lkYqCRFKvbvUBKbPtkStfHDnHUtViKPVPe6DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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