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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72df386ce0ed313417ed1d3323f624bee8d8144257e25f6a056ab5c5cfeddd2e' 
  AND token = 'lw+nbd/iUM+ErpyOvYLX6xc0ffvfO/VSaVi8MsDcQ7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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