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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a96f7eb8dded1504b32f8ab460408e05aaa0067dc84617f982fa16bc5e3219b' 
  AND token = 'ThKfi/dAQw8FjJQuaa1tcVkzQQPurYuv0j6n6qSdPL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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