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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '384c32eab0c8810d4ae01ba17fab8a0f2d4137ea8f6a4f8ae74315d577044fa3' 
  AND token = '5s0dSgaJi6lvA2IBryZTcrskdzq70eHi/E96OGzKi1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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