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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a5e8d0454e7caccb9f3cf427480c691cd35aab82ede14ee1e7286a119199cfe8' 
  AND token = 'daW45Awzs8t4CXhdlCs2HYB+IW3j7f86XdpUnT8sDfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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