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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a24b277b4611d4ab44a0ac6d25aaef12a4c57a6f4f110ed69ffa8851dd858b96' 
  AND token = '1YG3C/eXASF0HL++6yu+dtznRJDsW0dy/7L83bNRYk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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