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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ba932c7518030d9c1f8716c34b0ea7220f129239923b4b5f31242249c6d1419' 
  AND token = 'OXPMD5gwcGA3v3L5JEVC/EE6C+WSgYOwORu3Jkpbx5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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