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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ee80bf8fda5fa825d60f9689671545a190149727893b15fdbd06f550f22b3ed' 
  AND token = 'ji2Cgs9kpJTsE2P52hTl+o6MmaY98jUs+sbSU/e9IRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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