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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '069077fbf640fc6d86ae0d36ed59c714ae75e44201070d536ffce68bc71b7348' 
  AND token = 'iSWXHoO77JuHEXj4x/b/BBOHOKUHTip5gwd+9Dtfoe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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