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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4f0392a0ad39b396257a144a80eee9394e0c39484c5e64ca8f10e3aeba1b7cd' 
  AND token = '3ItXvYHbYOta5IUkJ+/v/lhBsd70R0lxRTYlLgT6cRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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