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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1343fb7ee23575de1e93a761969f7d05d878e5a1802585e6ba1be6b7b6d3e065' 
  AND token = 'dehxu8R5saX4Ztl1KoPoWB61hdjnx07pjDM8zpq8HmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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