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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ddbc911d5c9d11d8edb07a7e85bf87084668d98a94ace5694c2150bb7303922' 
  AND token = 'BcvF09yAgKB4gqSiDoU4hTi9zOK1WAHV5A5rvKPtZAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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