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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd01bbafe8ee6ec043da6947fabe3fa245a26258964719a2bf7d91310c0274db4' 
  AND token = 'Dl96DnnEcJFnDxQC943tlFBeR717kDuqk1w3h0Sai/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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