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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bae3dfd7d4e470381ce5f983640eae87fe06fac3ea03682ceaff2b39ce8e42bf' 
  AND token = 'e2L0P9za+TrJHyodznjqepvDiBPe825qvRt3eyEccTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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