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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0be87ac6f5d741c3ddd408f83fc4d2134dc3766153bd3dd6de172c58fe064b24' 
  AND token = 'rx7Htj899Gw0s/Dpyljdnvef0EvwLpkNPlkW6EpTcL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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