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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0045e7c522be582008bdda71735a51a5133e4fa6fc2a4f407bb574003f3e87ea' 
  AND token = 'uEASgW/u7Er1YeHci13O7TMzAvyUyeGxvgAPxJ7NgQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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