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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd70725d233f52fb9dc1bf00d2cf3013933b4da9d89a47b87735901e9cb9e74cf' 
  AND token = 'FcUcUMGtU3XmhI9UpXtA6+yIRX7h1hhEIfwE6dDtKjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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