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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e43b08c5c3aff6065d9b16ebab73722ef59f93c80095c750c472c0ae20a21e9' 
  AND token = 'N4vwd5tldqU8g8nmXN6rX/S4GJpTDJZFrLlJKOOIekg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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