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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93dc7ab5f1419cc34c2545dc2087bbbc0ef030b71a8c312ec947442e2cc44a95' 
  AND token = 'WnId5ktSzjD0dqT0qr6DUnqJQrEoWgkyoMA7xKZVJ44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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