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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '164db314a280ab87c56ff25a950d3dc5050bebb7d8367f2823ec0da6ed46c809' 
  AND token = 'g/Xp0TchOGI2TXaiakYdbAIOlRYuXHVSTgZdSQHGP5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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