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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '910012f148323e5b9bd33866b811e7d00fcce710ebc4f44a2f331c629bb4db9a' 
  AND token = 'XiUbVJyp8BfT9V2HAbg92Gdy4gpK11suJ/f/L/6LlUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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