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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06a3efab0bafeb5cf8a6f2a111814f5d94b839d7e9b2bb4cb2c7516f8fea5038' 
  AND token = 'Wnbfua9pgvTvtFnJhOH1ec8kcipvIpYZyFbD0wnYdJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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