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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24009bde1035565ac440fe39188e28e7a8c1dd717cd0199a981a2de46b28cd83' 
  AND token = 'l3LD6A+RujE3XB+Vk2zQnFeAQNeonjhP4UYK7EIq6wY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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