SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2d3a4753618d0d258c6543d5f0535b55f3f271fa6e84b0272b7c397fd9d63ef' 
  AND token = 'oj815bsqsIJcj1BULDNyyBQLSFMDGkxLXKcKutYwmVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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