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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '12b0084e7e7d73cb656afd8503d26d525362b9522cedd959476c22ec5ac4f27d' 
  AND token = 'iePu8ihexFnU7pVO7SHz0r0ZXlsl9K7f72e4SkGktwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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