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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53f04b4d3b38905600cc289dda6d8987eafffe2f534733f4c727ba1cc5decd19' 
  AND token = 'XHGHKPli65gdQ1K40FunnrJuyUVWD3M3TU/U1gJLars=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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