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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f32df6dbc5bd507d6595fdfec56a32fba5a7d597c407b47cd025a3c9bf2b1ff' 
  AND token = 'LaulmmNQLg5Ao4U/yajnt7HuejndiQJELldXyU+EI/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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