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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06296ce68cf27755a5a54acaf1dd2c106e1672099f7e0cfd0d8d4bf16821b976' 
  AND token = 'ySYkesHkXC1dHaEpuVKYCNpB2KvWsckxLeHnrXmf9Ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00113

JSON explain

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