Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1f2e108fe5897082d768bfe8033c3772e0d5e0a71ee150869b077a3fb707bd1' 
  AND token = 'mftJR8GM35TxGu9bvmSDCjpMG1OpzUVxeXIRMthGpY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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