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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a1eb1ec6455cd32c7f36a4e874b790451eb1e261868a2c2e7ba5dd676d891ec' 
  AND token = '5Ue3MAVx2FS9/SxAIrSrQMEmlySVzkleYHLftxc/Rsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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