SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '667182e6ccb0dff8b24512d50cfa845d54bb1a434d3fad6451d81a163b2445eb' 
  AND token = 'BEPWjq2akF/t3Mm5+wm7vA4h/6H7PO18pyGKDhJzmLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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