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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8609667589d5543b5c90f715ae7a618cddc222deae9b70abed7455c7ccb0b434' 
  AND token = 'WO0ej0KQ924HPLtol84eAkqaOzqkVF6aRnDofU2Di68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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