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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ceebb4ead1759becf8706f9abe4cffc8f3d5e0c29a0cc6c14b1eef8c5c4ebc0c' 
  AND token = 'ffJLt7bXmwRvhrE3HDNTm/sftMKZA/HYNDx6TPYhWCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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