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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dd8069f27d3244a11289754520548c1f48a1b869f8dcc456004755128361131' 
  AND token = '3xGMu2Clji1XOABUOdRcSy6DzZcr5XEnC4BlsYx/E1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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