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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd779b59589439ae8bfeae3ba4e72cd3e10a5e7c8b27bf6e9385d8982165c6a3e' 
  AND token = 'QuZLCSrWkn/00/nkezb98wi7z9Q5zRovbZzSwuaV72M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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