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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'beb972aa7c5d819ac1eb84aba261925b4421ba79cf9c11a7cb21d3829dc8d882' 
  AND token = 'OWlam9TmETPHoR75c2BR1H2VI0BbQFs6tfHDChAJBlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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