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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa25a90430afbbfed62d9511cf8f75a21d86a7c9ca59edbcd1a3dbe38fbecbf6' 
  AND token = 'YckR/tKLlFowZzhxx76G1wqlIKkelonWv8e8zsFdFZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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