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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90130ec23fb407bcb83141d132567d42e7917874375766cd1536a27dbea49cc4' 
  AND token = 'Us3J4imHc+aQgPRw0z0+GDrDceHY7rCN1LaozD4FGaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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