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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '508b6e7190c6b4a4883b538ff64e9778d7fab692905b57d91fb4ac35c75c02de' 
  AND token = 'Aocz9gjXvkGRzP5uxrxhP5ge0IPqnI12nJ0WRrGHL8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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