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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adeb27ed3ed7dfee26b16a5c761d04170b4cd335c8d7a8597d12b49db1eab3f9' 
  AND token = '/LDi4ACitnBWyi5A4ljLjBYyHLerDN/2xuEw+Izjmlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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